package com.hliushi.netty.c1;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;

/**
 * @author llhuang10
 * @date 2021/10/18 22:20
 */
public class HelloServer {

    public static void main(String[] args) {
        // 1.启动器, 负责组装netty组件, 启动服务器
        new ServerBootstrap()
                // 2.BossEventLoop, WorkerEventLoop(selector, thread), group组
                .group(new NioEventLoopGroup())
                // 3.选择服务器的 ServerSocketChannel 实现类
                .channel(NioServerSocketChannel.class)
                // 4.boss负责处理连接 worker(child)负责处理读写, 决定了worker(child)能执行
                .childHandler(
                        // 5.channel代表和客户端进行数据读写的通道, Initializer初始化, 负责
                        new ChannelInitializer<NioSocketChannel>() {
                            @Override
                            protected void initChannel(NioSocketChannel ch) throws Exception {
                                // 6.添加具体handler
                                ch.pipeline().addLast(new StringDecoder()); // 将ByteBuf转换为字符串
                                // 自定义
                                ch.pipeline().addLast(new ChannelInboundHandlerAdapter() {
                                    // 读事件
                                    @Override
                                    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                        // 打印上一步转换好的字符串
                                        System.out.println(msg);
                                    }
                                });
                            }
                        })
                // 7.绑定监控端口
                .bind(10010);

    }
}
